Harster Heating & Air Conditioning

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We serve St. Louis and the surrounding area.

We take care of heating
and air conditioning
in your home since 1950

Thanks for stopping by

You'll find everything you need right here. Our team is on top of (and inside, and around) all things HVAC. We work with the top manufacturers, and our customer service is the reason we've been in business 65+ years.

If you have questions or suggestions, please drop me a line through the contact page. Yes, I do read the emails personally. Also, check back because we change up our special offers fairly often. Thanks for visiting.


Dave Harster, President


Our Services

For home or business, heating and cooling repair, installation or maintenance.

Call Harster for a free estimate.

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an HVAC contractor?

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We offer financing!

Call today to learn more!

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Still not sure about Harster?

If you have any questions or suggestions, please drop me a line through the contact page.



Client Testimonials

I could write a book, but to try and keep it short, this company has been amazing!! We called when it was HOT! HOT! HOT! and our ac wasn’t working right. We knew it needed to be replaced. They came out the same day, gave us the bid and we scheduled for the next day installation. I’m a worrier and have called a couple times thinking something wasn’t right with the unit. They sent someone out within a couple hours to take a look. Everyone we’ve encountered has been professional. I recommend this company.
- Kaci G. St Louis, MO
Harster is a great company to work with. They replaced our furnace and fixed our AC over the past 12 months. Each time they have provided the most value compared to other HVAC bids we received. Very easy to get a hold off, return calls promptly, walk through everything very clearly and are friendly to deal with. I highly recommend them for any HVAC needs.
- Jonathan F. St Louis, MO
This week, our AC was blowing neutral air without cooling the house. We called the next morning at 8 am and they were out that day by 10:30 am to check it out. As soon as he arrived, the tech knew immediatly what the problem was once we described the symptoms. He went outside and quickly replaced a burnt out wire on our ac compressor. We initially thought we were going to have to get a new AC since it is nearing the end of its life cycle, so getting the diagnosis and fix for much cheaper than we originally thought was so relieving. When it’s time to get a new AC finally (probably next year) we will definitely be giving Harster a call! Thank you for making my week!
- Shannon S St Louis, MO


Our Blog

January 30th, 2020 The History of Harster Heating & Air Conditioning

We’ve got a long history in south St. Louis. Our company was started by my dad, Emil F. Harster, in 1950. It was a one-man, one-truck company and it’s grown to 28 employees and 24 trucks today – [...]

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January 30th, 2020 Why Harster?

Sure, we could tell you how great we are, but our customers do a way better job. And if you’re one of those very happy people and haven’t piped up, let us know about your experience here. Also, i [...]

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Contact Us

9900 Gravois Road

St. Louis, MO 63123

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Harster Heating & Air is taking the necessary precautions to keeps its customers and employees safe during this COVID-19 situation.

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